<template>
    <div class="login_container">
        <div class="login_box">
            <!--头像区域-->
            <div class="avatar_box">
             <img src="../assets/touxiang.jpg" alt="">
            </div>
            <!--登录表单区域-->
            <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
                <!--用户名-->
  <el-form-item prop="username">
    <el-input v-model="loginForm.username" prefix-icon="el-icon-user-solid"></el-input>
  </el-form-item>
  <!--密码-->
  <el-form-item prop="password">
    <el-input  v-model="loginForm.password" prefix-icon="el-icon-shopping-bag-1" type="password"></el-input>
  </el-form-item>
<!--按钮-->
  <el-form-item class="btns">
  <el-button type="primary" @click="login"> 登录</el-button>
  <el-button type="info" @click="resetLoginForm">重置</el-button>
  </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>
export default {
  data () {
    return {
    // 这是登录表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 这是表单的验证规则
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 5, message: '长度在 3 到 5 个字符', trigger: 'blur' }
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 10, message: '长度在 6 到 10 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 点击重置按钮，重置表单
    resetLoginForm () {
      // console.log(this)
      this.$refs.loginFormRef.resetFields()
    },
    login () {
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.$message.error('登录失败')
        this.$message.success('登录成功')
        // 1.将登录成功之后的token，保存到客户端的 sessionStorage 中
        // 1.1项目中除了登录之外的其他api接口，必须在登陆之后才能访问
        // 1.2 token只应在当前网站打开期间生效，所以将token保存在sessionStorage中
        console.log(res)
        window.sessionStorage.setItem('token', res.data.token)
        // 2.通过编程式导航栏跳转到后台主页，路由地址是 /home
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container{
    background-color: #a2cefa;
    height:100%;
}

.login_box{
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);

    .avatar_box{
        height:130px;
        width:130px;
        border: 1px solid #eee;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px #ddd;
        position: absolute;
        left: 50%;
        transform: translate(-50%,-50%);
        background-color: #fff;
        img {
          width: 100%;
          height: 100%;
          border-radius: 50%;
          background-color: #eee;
        }
    }
}

.login_form{
    //底部对齐
    position: absolute;
    bottom:0;
    width:100%;
    padding: 0 20px;
    box-sizing:border-box;
}

.btns{
    //居右对齐
    //display: flex;
    //justify-content: flex-end;
    //居中对齐
    text-align:center;
}

</style>
